Aelian, On Animals 15. 23 (trans. Schofield) (Greek natural history C2nd to 3rd A.D.) :
"Apollonios of Rhodes or of Naukratis says that the pilot-fish was once actually a human being and a ferryman. And Apollon fell in love with a maiden [i.e. Okyrhoe, although she is not named by this author] and attempted to lie with her, but she escaped and came to Miletos and implored one Pompilos, a seaman, to conduct her across the strait. He agreed to do so, but Apollon appeared and seized the maiden, turned the ship to stone, and transformed Pompilos into this fish."